From: kurt_erich_finger@my-deja.com
To: isdn4linux@listserv.isdn4linux.de
Newsgroups: de.alt.comm.isdn4linux
Subject: HOWTO Linux ISDN Internet
Date: 	Sat, 23 Oct 1999 15:50:00 GMT
Organization: Deja.com - Before you buy.
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Da es nicht ganz so einfach ist mit ISDN ins Internet zu kommen,
hab ich mal einiges zusammengeschrieben.(in Englisch, damit auch
andere etwas davon haben). Ich hab's auch nur mit Hilfe der
newsgroup geschafft. Vielleicht sind folgende Zeilen fuer einige
user ja ganz nuetzlich. Fuer Details ist dann das Linux (ISDN) Howto
ganz nuetzlich.

Falls jemand der Meinung ist, dieses Posting war unnoetig,lasst es mich
wissen

Kurt-Erich Finger

---beginners only----
I tried get into the internet using LINUX and an ISDN-card.
In the manual for the LINUX distribution (SuSE 6.1) almost everything
was explained but some crucial information (for a newbee) is missing.
With the help of this newsgroup I was able to overcome the problems.
I thought it would be a good idea to write a tiny HOWTO for beginners.
Since ISDN is not only used in Germany but also in other countries I
decided to only write it in English.
(If you think this should not appear here, please let me know.)
I choose otelo to give a working example, if you prefer another provider
you can change the details later. If you don't live in Germany modify
the
example as necessary.

My configuration:
	SuSE 6.1
	Kernel 2.2.5
	ISDN-utils 3.0
	Virgin PC with Win98 and LINUX (loadlin)
	Fritz!card PnP (no other cards)

1.Try to find out which IRQ and Port can be used. If you run the card
  already under Win you can find it under >Setting>System.
  (I use IRQ=3, address: 200, I know there could be conflicts with
COM2!)

PnP cards:
2. run/sbin/pnpdump -c > /etc/isapnp.conf
   Edit /etc/isapnp.conf

 (READPORT 0x0203)
 (ISOLATE PRESERVE)
 (IDENTIFY *)
 (VERBOSITY 2)
 (CONFLICT (IO FATAL)(IRQ FATAL)(DMA FATAL)(MEM FATAL)) # or WARNING

 (CONFIGURE AVM0900/-1 (LD 0
 (IO 0 (SIZE 32) (BASE 0x0200)(CHECK) )
 (INT 0 (IRQ 3 (MODE +E)))
 (NAME "AVM0900/-1[0]{AVM ISDN-Controller FRITZ!Card}")
  (ACT Y)
 ))
 (WAITFORKEY)

  The lines (IO (SIZE 32) (BASE Ox0200)) and (INT 0 (IRQ 3 (MODE +E))
should
  contain the values you want. If necessary remove the # signs at the
  beginning of all above lines.

   Save the file and start
          isapnp /etc/isapnp.conf
   If you receive an -FATAL- error message, first delete :
                (CHECK)  !!!!!
   in the configuration file and start isapnp again.
   If you still get resource conflicts try other IRQ's and addresses.
   Switch the auto configuration for ISA-pnp the BIOS off.
   If you get an ISOLATE PRESERVE error, reboot.

all cards:

3. Run Yast
   Strictly follow the SuSE manual.

   A device named ippp0 must exist!!!!!!

   I assume you want to connect to a provider who uses dynamic IP-
addresses
   syncPPP and PAP or CHAP for authorising.
   I will describe how you can make a connection to otelo (Germany)
since
   you can connect directly without an account (username:otelo,
   password: online)

   Using Yast the IP-Address can be : 192.168.0.99
                  Netmask           : 255.255.255.255
                  Default -gateway  :  -
                  IP-Adress PtP     : 192.168.0.1
   The last address could cause problems with t-online, use 192.168.1.1

   Configure the Name-Server:
   List of IP Addresses : 195.50.149.33 195.50.149.6
   List of Domains      : otelo-online.de
Leave Yast

Make sure the file /etc/isdn/isdn.conf contains
your COUNTRYCODE and AREACODE without the leading 0
Boot or activate ISDN under Yast to start the network.

When you configure with Yast the PAP protocol is set.
otelo and probably some other provider need CHAP!!!!

Let's see what happens if we try to connect:
         isdnctrl dial ippp0
will try to connect to your provider.
Check /var/log/messages!
If you don't see local and remote IP addresses but
ISDN error messages or a 'Modem Hangup' something went wrong.
To find out you need more information in the messages file.
Edit /etc/rc.config.d/I4L_sp_option.rc.config
     I4L_VERBOSE=yes
and in /etc/ppp/ioptions
uncomment  debug.
This should give enough information in the /var/log/message file.

If you try to connect to otelo you will find that your computer
is sending a string containing <PAP> and otelo sends <CHAP> indicating
that you have to change the protocol from PAP to CHAP.
To change the protocol you have to add
    user otelo in /etc/ppp/options.ipp0
add
  # client	   server	secret			IP addresses
     "otelo"	*	"online"
to /etc/ppp/chap-secrets and delete the corresponding line in
/etc/ppp/pap-secrets.

Start isdnctrl dail ippp0 and watch /var/log/messages. If you seen see
IP addresses you made it.
Otherwise read some of the links in the Weekly ISDN FAQ of E.Corry.

Now you have a connection to your provider and you may want to use the
Netscape Navigator.
First another problem needs to be solved:
If no traffic is on the line it will be cut and the default route will
be deleted.
(You will find the time-out in /etc/rc.config.d/I4L_option.rc.config
I4L_IDLETIME)

The file /etc/ppp/ip-up (ip-down is only a link to ip-up) has to be
modified:
BASENAME=`basename $0`
INTERFACE=$1
DEVICE=$2
SPEED=$3
LOCALIP=$4
REMOTEIP=$5

case "$BASENAME" in
ip-up)
        /sbin/route add default gw $REMOTEIP dev $INTERFACE
        #/sbin/init.d/route start $INTERFACE
        ;;
ip-down)
        /sbin/route add default gw $REMOTEIP dev $INTERFACE
        #/sbin/init.d/route start $INTERFACE
        ;;
*)
        ;;
esac

(from http://www.suse.de/sdb/de/html/isdn-defroute.html (dynamic IP-
numbers))

Now you can start
  isdnctrl dial ippp0
  startx  (kde)
  Netscape

I hope it works with you!

In case of problems check-out http://www.suse.de
deutsch: http://www.franken/de/users/klaus/DE-ISDN-HOWTO
English: http://www.wurtel.demon.nl
French:  http://www.perso.wanadoo.fr/philippe.latu


Kurt-Erich Finger


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